Datasheet

MAX1960/MAX1961/MAX1962
2.35V to 5.5V, 0.5% Accurate, 1MHz PWM
Step-Down Controllers with Voltage Margining
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
VCC
= 3.3V, Circuits of Figures 9–12, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
2.7V ≤ V
VCC
≤ 5.5V, I
LOAD
= 1mA to 50mA 4.75 5.25 V
2.35V ≤ V
VCC
≤ 2.7V, I
LOAD
= 1mA to 35mA, C1
= 4.7µF, C6 = 22µF (Note 1)
4.45 5.25 V
V
DD
Output Voltage
2.35V ≤ V
VCC
≤ 3.6V with tripler, I
LOAD
= 1 to
50mA (circuit of Figure 12) (Note 1)
4.75 5.25 V
Reference Voltage (No Load) 1.269 1.280 1.291 V
Reference Load Regulation -50µA to +50µA3mV
V
OUT
= 0.8V 44 53 62
V
OUT
= 2.0V 45 50 55
Positive Current-Limit Threshold
(V
PGND
- V
LX
)
MAX1962
V
OUT
= 3.3V 38 48 58
mV
Negative Current-Limit Threshold
(V
LX
- V
PGND
)
MAX1962, V
OUT
= 0.8V to 3.3V 38 50 68 mV
CS Bias Current MAX1962, V
CS
= 3.3V 20 50 µA
OUT Bias Current MAX1961/MAX1962, V
OUT
= 3.3V 30 50 µA
Current-Limit Threshold (Positive
Direction, Fixed, V
PGND
- V
LX
)
MAX1960/MAX1961, ILIM = V
DD
58 74 90 mV
Current-Limit Threshold (Negative
Direction, Fixed, V
LX
- V
PGND
)
MAX1960/MAX1961, ILIM = V
DD
50 67 85 mV
MAX1960/MAX1961, R
ILIM
= 160kΩ 100 114 135
Current-Limit Threshold (Positive
Direction, Adjustable, V
PGND
- V
LX
)
R
ILIM
= 400kΩ 250 279 306
mV
MAX1960/MAX1961, R
ILIM
= 160kΩ 90 107 125
Current-Limit Threshold (Negative
Direction, Adjustable, V
LX
- V
PGND
)
R
ILIM
= 400kΩ 245 271 296
mV
Thermal-Shutdown Threshold 15°C hysteresis +160 °C
DH Gate-Driver On-Resistance V
BST
- V
LX
= 5V, pulling up or down 1.8 3.5 Ω
DL Gate-Driver On-Resistance (Pullup) DL high state 1.8 3.5 Ω
DL Gate-Driver On-Resistance (Pulldown) DL low state 0.5 1.6 Ω
DH falling to DL rising 35
Minimum Adaptive Dead Time
DH rising to DL falling 26
ns
Minimum high time (Note 1) 200
FSET/SYNC Pulse Width
Minimum low time (Note 1) 200
ns
FSET/SYNC Rise/Fall Time (Note 1) 100 ns
CTL_, FSET/SYNC, EN Input High Voltage V
VCC
= 2.35V to 5.5V 2.0 V
CTL_, FSET/SYNC, EN Input Low Voltage V
VCC
= 2.35V to 5.5V 0.8 V
CTL_, FSET/SYNC, EN Input Current -1 +1 µA
CLKOUT V
OL
Sinking 1mA 0.01 0.1 V
CLKOUT V
OH
Sourcing 1mA
V
VCC
-
0.2V
V
VCC
-
0.01V
V
CLKOUT Rise/Fall Time C
LOAD
= 100pF (Note 1) 40 ns